node-rw 1.3.3-1 (i386 binary) in ubuntu groovy

 The rw provides an interface just like readFile, readFileSync, writeFile and
 writeFileSync, but with implementations that work the way you expect on stdin
 and stdout.
 .
 If you use these methods on files other than /dev/stdin or
 /dev/stdout, they simply delegate to the fs methods, so you can trust that
 they behave identically to the methods you’re used to.
 .
 Node.js is an event-based server-side JavaScript engine.